Combined rotary valve



Patented Dee. 7, 1926.

a i r 15' .fl e s t aser.-

OWEN M. CRUIVILY, OF GABLISLEIOWA.

COMBINED ROTARY VALVE Application filed April 5, 1926. Serial No.99,860.

The object of my invention is to provide a combined rotary valve ofsimple, durable and comparatively inexpensive construction. A furtherobject of my invention is to provide novel means for lubricating myrotary valve whereby oil is in continuous contact therewith andconvenient means for replenishing the supply of lubricant.

Still a further object is to provide an easily operated and readilyaccessible device for preventing admittance of air into the fuel duringthe intake stroke.

Still a further object is to provide means driven by the engine foroperating my improved valve. Still a further object is to so constructand arrange the various parts whereby replacements are easily andquickly made and the valve is readily accessible for grinding the wornsurfaces.

With these and other objects in view, my invention consists in theconstruction, arrangement and combination of the various parts of myinvention, whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my claims, and illustrated in theaccompanying drawings, in which:

Figure 1 is a vertical transverse sectional view of an internalcombustion engine illustrating my combined-rotary-valve mounted theron.I

Figure 2 is a detailed view in perspective of the valve-casing.

Figure3 is a .bottom plan view of the valve only. I

Figure 4 is a top planview of a pressure device used in connection withmy valve.

Figure 5 is a side elevation of the pressure 1 device; and

Figure 6 is a perspective view of a key or keeper used inmy valveconstruction.

On the drawing 1 have used the reference numeral 10 to indicategenerally a four cycle internal combustion engine.

Avalve casing 11 is an extended portion, a or an integral part, of theengine/head 12 and may be suitably positioned adjacent the combustionchamber 13 to minimize the travel of gas between the combustionchamberand the valve proper 14. The valve-casing 11 has adjacent thecombustion chamber 13, .an'aperture or port 15 having communication withthe combustion chamber 13 through a passage 16.

It will be noted by referring to Figure 1 that the upper portion of thevalve casing 12 is bored cylindrical as at 17 with vertical sides and isbored in the shape of a truncated cone as at 18 for the reception of thetruncated cone shaped valve 14. It is therefore obvious that the lowerthe valve 14 is in the casing-12, the tighter it will be for providinggas tight joints to prevent admittance of air to the fuel during theintake stroke.

The upperend of the valve-casing 12 is internally screw-threaded as at19 and is externally screw-threaded as at 20. i

A pressure-device comprising a horizontal ring 21, externallyscrew-threaded, and a vertical ring 22 is received in the upper end ofthe casing 12. The threads on the ring 21 coact with the threads 19 ofthe casing 12 whereby the pressure device may be vertically adjustedrelative to the casing 12 by screwing it inwardly or outwardly. Therings 21 and 22 form what might be called a cage. A rod 23 is slidablyreceived in the upper portion of the ring 22 and has an enlarged end 24slidably received in the lower portion of the ring 22. The end 24 isrectangular in cross section and fits through a rectangular opening 22*in the ring 22 whereby the rod 23 does notrotate. A coil spring 26 iscarried by the rod 23 and is interposed between the enlarged end 24thereof and the upper portion of the ring 22 whereby the point 25 on theend 24 is constrained to move in a downward direction. This movement ofthe rod 23 is transmitted to the valve 14 by the point 25 coacting witha depression 27 in the top of the valve whereby the valve 14 at alltimes snugly fits within the valve casing 12.

From the foregoing it will be seen that an adjustable spring pressuremay be applied to the valve 14 by screwing the pressure device up. ordown in the casing 12.

The portion 17 of the valve casing 12 may be cylindrically bored asillustrated or may be made in any suitable form.

For locking the-pressure device against rotation after it has beenadjusted, 'I provide a key ,28 slidably; mounted ina dove -ill provides"the intake tail groove :29 fin the ring '22 and l-raving a lug 30 forselectively coaeting' With one of a plurality of notches 31 in the upperend of the casing 12. After the pressure device has been tightened sothat the spring 26 exerts the desired pressure on the valve 14-, thegroove 29 is brought in alignment with one of the notches 31 and the key28 inserted in the groove 29 With the lug 3O engaging the notch 5:31.

ll provide a cap 32 or enclosing the uipper end or the valve casing 12.The cap 32 is interiorly screw threaded as at 33 for coacting With thethreads 20 on the casing 12. The cap 32 threaded as at 36 to receive aplug 34. The plug 3'1 has a recess 38 whereby said. plug does notinter-- 'ierje vvi'tht'he action of the pin 23. A vent opening 39 isprovided int 1e plug 3'7. The space above the valve 1% and in the capform an oil cavity 145. Oil may be supplied to the cavity l l byremoving the plug 8?. The oil in the cavity 145 is al- Ways in contactWith the top oi the valve t and lr'eops tne valve seat lubricated. Bythe remonl. or the cap 32 and the 21 22, th valve l t may be removedfrom the valve 12 for replacement or for grinding of the valve and seat.On the key 28 is formed a projection 28 Which is engaged by the cap 32for preventing disengagement of the lug 30 from the notch 31 when thecap 32 is in place.

At the central portion of the valve proper 14 and in radial alignmentare ports and 41. The port 411 is the exhaust port and the port 20 isthe intake port.

From the foregoing will be seen that the port 15 forms a dual purposeport and,

exhaust port 43 is provided diametrically opposite the port ll andspaced vertically therefrom; and also from the port 42.

Passage Ways t8 and e9 are provided in. the valve 14: between the ports40 and 42 and the ports 41 and 4-3 "respectively. The passages "and as 2curves as shown so that one does not interfere 1 1th the' ot-her.

An intalre port 4.4 and an exhaust port '45 are provided in the easingisand {are in alien-tint v-itlrthepoi s l2and t?) respectively An intakemanifold 46 supplies.

fuelto' the poi-t arena an eXhaustma'nh liaust I 'th-rough the port Inthe op ion of wartime-rot ryvalv the i alrfe a e-es in eminentl micaouterwear QlCl 'tli-aid the "(36311191256011 "ofthe head llo'f theenyine 10.

clear-means for adjusting and lubricatin #my improved valve.

C-lIZl'IHbQ-l 13. The exhaust passage 49 intermittently provides meansof communication between the combustion chamber 13 and the exhaustmanifold &7.

It will be noted by referring to lligure 2 that the ports 44: and 45 arelonger circumterentially off the valve than the port The purpose ot thisis so that ports 42 and 43 in passing ports and 45 Will main-- ta'in thepassagewa s -l8 and 49 con'ipletely open vchile ports 40 and are passingport 15. The port 15 in conjunction with ports 40 and 4-1 thereforeserves to time the valve and the length of these ports dc termine thelength of time the passages 48 and t9 open to the combustion chamber Theport 15 is approxiniiately one-half the length of the ports 4-001 '41.The valve 14, is rotated one revolution during the complete enginecycle. The timing of the respectivepassages; namely, intake and exhaustis determined by the manufacturer and attai ed by making the respectiveports l of adequate length, in the line or the rotat on of the valve 1%,relative to the length oi the port 15, so as to produce the requisitetime of opening or closing the passages 4.8 and d9, respectively. T hevalve 1 1 has recess 50 the bottom end thereof and may be rotated by theusual cam shaft 51 throulo'h the medium of any suit able system orgearing. In Figure 1, .1. have illustrated a vertical drive shaft drivenfrom the shaft 51 by intermeshing bevel gears 53 and 54. A. tongue 55 onthe upper end of the shaft 52 coacts with the recess 50 whereby rotationof the shaft Will rotate the valve let and said valve may be verticallyadjusted and still remain in operative engagement with the shaft- Thevalve 14. rotates in the direction indicated by the arrow 56, but may bemade to be rotated in the opposite direction, by exchanging the ingressand egress of My valve may be operated perpendicularly, as illustrated,or horizontally or in any intermediate position. The extra combus t'ionchamber space requisite for operation of my valve is only that of thepassage 16 which can be even less than that shown on the drawing. Myinvention as il'lustrated'in the drawings is'in conjunction with an"engine having one cylinder but it is obvious that one valve assemblymay he applied to each cylinder ofeng'ines li vll'l'g plurality ofcylinders One feature of the invention is "embodied in the convenienceofthe c oinbinedrotary valve A describedwithout ne'c'essitatingtheremoval It is also obvious that I hafi' eprovided 'n-ovel'and eni-'--Seme 'zidhanges may be made in the conein'g -r'eadily accessiblepreviously llit) struction and arrangement of the various parts of myinvention, without departing from the real spirit and purpose of myinvention and it is my intention to cover by my claims, any modifiedfroms of structure or use of mechanical equivalents, which may bereasonably included Within their scope.

I claim as my invention:

1. A combined rotary valve for four cycle internal combustion enginescomprising a valve casing having a truncated cone shaped opening, atruncated cone shaped valve rotatably mounted therein, the top of saidvalve being spaced below the top of said casing, a pressure devicemounted in one end. of said casing and comprising a cage like device,threaded to coact with threads in said valve easing, a pin slidably andnonrotatably mounted in said cage, notches in said casing, a dovetailgroove in said cage, a key slidably mounted in said groove, a lug onsaid key for coacting with one of said. notches, a cover for said valvecasing, a portion of said key adapted to be engaged by said cover, anopening in said cover, whereby lubricant may be supplied to the spaceabove the valve and a plug for said opening.

2. ,A combined rotary valve for four cycle internal combustion enginescomprising a valve casing having a truncated cone shape-d opening, atruncated cone shaped valve rotatably mounted therein the top of saidvalve being spaced below the top of said casing, a pressure devicemounted in one end of said casing and comprising a cage, a pin slidablyand non-rotatably mounted in said cage, notches in said casing, dovetailgroove in said cage, a key slidably mounted in said groove, a lug onsaid key for coacting with one of said notches, a cover for said valvecasing, a portion of said key adapted to be engaged by said cover, anopening in said cover, whereby lubricant may be supplied to the spaceabove the valve and a plug for said openin 3. A combined rotary valvefor four cycle &

with the other end of said passages, a pressure device mounted in oneend of said casing and comprising a cage threaded to coact with threadsin said valve casing, a pin slidably and non-rotatably mounted in saidcage, notches in said casing, a dovetail groove in said cage, a keyslidablymounted in said groove, a lug on said key for coacting with oneof said notches, a cover for said valve casing, a portion of said keyadapted to be engaged by said cover. an opening in said cover, wherebylubricant may be supplied to the space above the valve and a plug forsaid opening.

4:. A rotary valve for engines comprising a tapered valve casing, atapered valve therein and a pressure device comprising a cage adjustablyreceived in said casing, a spring actuated pin supported by said cageand en gaging the large end of saidv valve, notches in. said casing, adovetail groove in said cage, a key slidably mounted in said groove andhaving a portion adapted to coact with one of said notches, a cover forsaid casing, a projection on said key adapted to be engaged by saidcover.

5. In combination with a rotary valve having a casing and a valvetherein requiring a spring pressure thereon, a pressure devicecomprising a cage mounted-longitudinally adjustable in one end of saidcasing, a spring actuated pin supported by said cage and engaging saidvalve, means for locking the adjustment of said cage comprising a keycoacting with said cage and said casing.

OWEN M. CRUMLY.

